Python GUI编程(Tkinter)
===============================
## github项目地址：
https://github.com/zhendonger/tkinter-demo
## CSDN地址：
https://blog.csdn.net/qq_40923390/article/details/103146227
> 基于python版本 >3.0
## 安装所需库
pip3 install Pillow
## 运行效果：
1.登陆界面
2.注册界面
3.登陆成功界面
## 代码：
```python
#!/usr/bin/python
# -*- coding: UTF-8 -*-
import tkinter as tk
import tkinter.messagebox
import pickle
from PIL import Image,ImageTk
#窗口
window=tk.Tk()
window.title('欢迎进入学习系统')
# 获取屏幕宽度和高度
scn_w, scn_h = window.maxsize()
# 计算中心坐标
cen_x = (scn_w - 300) / 2
cen_y = (scn_h - 300) / 2
# 设置窗口初始大小和位置
size_xy = '%dx%d+%d+%d' % (500, 310, cen_x, cen_y)
window.geometry(size_xy) #设置窗口坐标
window.wm_attributes('-topmost',1)# 窗口置顶
#画布放置图片
canvas=tk.Canvas(window,height=300,width=500)
im=Image.open("./img/1.jpg")
imagefile=ImageTk.PhotoImage(im)
# imagefile=tk.PhotoImage(file='71.gif')
image=canvas.create_image(0,0,anchor='nw',image=imagefile)
canvas.pack(side='top')
#标签 用户名密码
tk.Label(window,text='用户名:').place(x=100,y=150)
tk.Label(window,text='密码:').place(x=100,y=190)
#用户名输入框
var_usr_name=tk.StringVar()
entry_usr_name=tk.Entry(window,textvariable=var_usr_name)
entry_usr_name.place(x=160,y=150)
#密码输入框
var_usr_pwd=tk.StringVar()
entry_usr_pwd=tk.Entry(window,textvariable=var_usr_pwd,show='*')
entry_usr_pwd.place(x=160,y=190)
#登录函数
def usr_log_in():
#输入框获取用户名密码
usr_name=var_usr_name.get()
usr_pwd=var_usr_pwd.get()
#从本地字典获取用户信息，如果没有则新建本地数据库
try:
with open('usr_info.pickle','rb') as usr_file:
usrs_info=pickle.load(usr_file)
except FileNotFoundError:
with open('usr_info.pickle','wb') as usr_file:
usrs_info={'admin':'admin'}
pickle.dump(usrs_info,usr_file)
#判断用户名和密码是否匹配
if usr_name in usrs_info:
if usr_pwd == usrs_info[usr_name]:
# tk.messagebox.showinfo(title='welcome',
# message='欢迎您：'+usr_name)
show_info()
else:
tk.messagebox.showerror(message='密码错误')
#用户名密码不能为空
elif usr_name=='' or usr_pwd=='' :
tk.messagebox.showerror(message='用户名或密码为空')
#不在数据库中弹出是否注册的框
else:
is_signup=tk.messagebox.askyesno('欢迎','您还没有注册，是否现在注册')
if is_signup:
usr_sign_up()
#登陆成功展示函数
def show_info():
#新建登陆成功界面
window.withdraw()
window_info_up=tk.Toplevel(window)
size_xy = '%dx%d+%d+%d' % (500, 658, cen_x, cen_y)
window_info_up.geometry(size_xy) #设置窗口坐标
window_info_up.wm_attributes('-topmost',1)# 窗口置顶
window_info_up.title('欢迎进入魔幻世界')
#画布放置图片
canvas=tk.Canvas(window_info_up,height=987,width=658)
im=Image.open("./img/3.jpg")
imagefile=ImageTk.PhotoImage(im)
# imagefile=tk.PhotoImage(file='71.gif')
image1=canvas.create_image(0,0,anchor='nw',image=imagefile)
canvas.pack(side='top')
tk.Label(window_info_up,text='No matter how far you may fly, never forget where you come from.').place(x=25,y=100)
tk.Label(window_info_up,text='No matter how far you may fly, never forget where you come from.').place(x=25,y=140)
tk.Label(window_info_up,text='No matter how far you may fly, never forget where you come from.').place(x=25,y=180)
bt_logquit=tk.Button(window_info_up,text='退出',command=usr_sign_quit)
bt_logquit.place(x=430,y=10)
def callback():
window.destroy()
window_info_up.protocol("WM_DELETE_WINDOW", callback)
window_info_up.mainloop()
#注册函数
def usr_sign_up():
#确认注册时的相应函数
def signtowcg():
#获取输入框内的内容
nn=new_name.get()
np=new_pwd.get()
npf=new_pwd_confirm.get()
#本地加载已有用户信息,如果没有则已有用户信息为空
try:
with open('usr_info.pickle','rb') as usr_file:
exist_usr_info=pickle.load(usr_file)
except FileNotFoundError:
exist_usr_info={}
#检查用户名存在、密码为空、密码前后不一致
if nn in exist_usr_info:
tk.messagebox.showerror('错误','用户名已存在')
elif np =='' or nn=='':
tk.messagebox.showerror('错误','用户名或密码为空')
elif np !=npf:
tk.messagebox.showerror('错误','密码前后不一致')
#注册信息没有问题则将用户名密码写入数据库
else:
exist_usr_info[nn]=np
with open('usr_info.pickle','wb') as usr_file:
pickle.dump(exist_usr_info,usr_file)
tk.messagebox.showinfo('欢迎','注册成功')
#注册成功关闭注册框
window_sign_up.destroy()
#新建注册界面
window_sign_up=tk.Toplevel(window)
window_sign_up.geometry(size_xy) #设置窗口坐标
window_sign_up.wm_attributes('-topmost',1)# 窗口置顶
window_sign_up.title('注册界面')
#画布放置图片
canvas=tk.Canvas(window_sign_up,height=300,width=500)
im=Image.open("./img/2.png")
imagefile=ImageTk.PhotoImage(im)
# imagefile=tk.PhotoImage(file='71.gif')
image1=canvas.create_image(0,0,anchor='nw',image=imagefile)
canvas.pack(side='top')
#用户名变量及标签、输入框
new_name=tk.StringVar()
tk.Label(window_sign_up,text='用户名：').place(x=100,y=100)
tk.Entry(window_sign_up,textvariable=new_name).place(x=240,y=100)
#密码变量及标签、输入框
new_pwd=tk.StringVar()
tk.Label(window_sign_up,text='请输入密码：').place(x=100,y=140)
tk.Entry(window_sign_up,textvariable=new_pwd,show='*').place(x=240,y=140)
#重复密码变量及标签、输入框
new_pwd_confirm=tk.StringVar()
tk.Label(window_sign_up,text='请再次输入密码：').place(x=100,y=180)
tk.Entry(window_sign_up,textvariable=new_pwd_confirm,show='*').place(x=240,y=180)
#确认注册按钮及位置
bt_confirm_sign_up=tk.Button(window_sign_up,text='确认注册',
command=signtowcg)
bt_confirm_sign_up.place(x=240,y=220)
window_sign_up.mainloop()
#退出的函数
def usr_sign_quit():
window.destroy()
#登录 注册按钮
bt_login=tk.Button(window,text='登录',command=usr_log_in)
bt_login.place(x=140,y=230)
bt_logup=tk.Button(window,text='注册',command=usr_sign_up)
bt_logup.place(x=210,y=230)
bt_logquit=tk.Button(window,text='退出',command=usr_sign_quit)
bt_logquit.place(x=280,y=230)
#主循环
window.mainloop()
```